Simultaneous Measurement of the DPOAE Signal Amplitude and Phase Changes

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Authors

  • Wojciech MICHALSKI Wrocław University of Technology Institute of Telecommunications, Teleinformatics and Acoustics
  • Marek BOCHNIA Wrocław Medical University Department of Otolaryngology, Faculty of Dentistry
  • Wojciech DZIEWISZEK Wrocław Medical University Department of Pharmacology

Abstract

Although the phenomenon of otoacoustic emission has been known for nearly 30 years, it has not been fully explained yet. One kind of otoacoustic emission is distortion product of the otoacoustic emission (DPOAE). New aspects of this phenomenon are constantly discovered and attempts are made to interpret correctly the obtained results. This paper discusses a new method of measuring DPOAE signals based on double phase-sensitive detection, which makes possible a real-time measurement of the DPOAE signal amplitude and phase. The method was applied for measurements of DPOAE signals in guinea pigs. Sample records are presented and the obtained results are discussed.

Keywords:

signals, double-phase-sensitive detection, guinea pigs